Being a Clown is no Laughing Matter
From the introduction:
An amusement park is a place of happiness, a carefree escape from the daily grind. But if your life is spent making sure other people have fun, then having fun is the daily grind.
Along with a grind like that imagine doing it in pancake makeup or as the back end of a horse and you’ll see why the laughter of children gets old pretty fast.